Baffle-plate door.



J. ZIMMERMAN.

BAPFLE PLATE DOOR. APPLICATION FILED JAN. 26, 1914.

Patented July 28, 1914.

mhhwooao THE NORRIS PETERS ca, PHOTO-LITHU. WASHINGTON, a, C.

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UNITED s'rA'rEs PATENT, orrrcn. I

JOHN ZIMMERMAN, orcouNo-IL mum, IOWA. 5

BAFFLE-PLATE DOOR.

To all whom it may concern Be it known that 1, JOHN ZIM ERMA'N, a citizen of the United States, residing at Council Bluffs, in the county of Pottawattamie and State of Iowa, have invented certain new and useful Improvements in Baffle- Plate Doors, and have described the same in the following specification, illustrated by the accompanying drawings.

My invention relates to that class of baflieplate doors which are used in connection with the fireboxes of locomotives.

The main objects of the invention are to improve the firing, and to regulate the fire, in such fireboxes; to economize fuel; to maintain a uniform temperature and to protect the fireman from the heat. To accomplish these objects I incorporate in my improved ba'lfie-plate door, a door proper covering a portion of the doorway, and a baffleplate, slidably attached to the door proper, and extending through the doorway.

In the accompanying drawings, illustrating the best manner in which I have contemplated applying the principles of the invention, Figure 1 is front elevation of a firebox provided with a baflie-plate door which is constructed in accordance with these principles. Fig. 2 is a vertical section on the secton line of Fig. 1, but showing the baffle-plate in a different position of adjustment. Fig. 3 is a side elevation of the door in a modified form.

In the illustrative specimen of my inven tion shown in Figsrl and 2, the door proper is a rectangular iron plate 1, which is attached to the front plate 2 of the firebox 6 by the hinge 3 and the latcht in a well known manner. This closes the upper portion, approximately half, of the rectangular doorwa 5 opening through the plate 2 into the fire ox. The baffle-plate 7 comprises a single rectangular metallic plate, bent into two rectangular portions, namely: the vertical portion 8 and the approximately horizontal portion 9. The portion 8 has two vertical spaced slots 10 and is adjustably attached to the door proper by the two sleeved bolts 11, working in those slots respectively as the baffle-plate is raised and lowered. Operatively the lower part of the doorway is covered, as in Fig. 1, by sliding the bafiie-plate to its limit downward on the sleeve-bolts, or is wholly uncovered by sliding that plate to its limit upward, and

. is either opened or closed partially by specification of Letters Patent.

sliding the same t1on, as shown in Fig. 2. By raising or lowering the baflie-platefthe fireman increases or diminishes at will the horizontal current of air which is thereby and thereunder directed over the coals; and by turning the nuts 12 on the sleeve-bolts he secures the lower position of adjustment whichmay be desired. Inevery position this plate is protected by the downward current of air between itself and the door proper, and is thereby prevented from burning out.

In that modification of my invention which is shown in Fig. 3, the door 1 is'fastenedat the top to the plate 2 by horizontally'alining hinges 8, and is provided with the door 1 is either held in the closed posltion shown in full lines in that figure, orheld alternatively in the raised position shown in dotted lines, as convenience may require. By a lug 15, projecting from the arm 18, and an abutting screw 16, seated adjustably in the plate 2 and working through a hold in the door 1, the latter may be stopped in an intermediate position partly open, when desired.

Constructed as described, my improved baffle-plate door presents a number 0 among the above stated objects of the invention. Completeness of combustion and consequent saving of fuel are promoted by the admission of an air current quantities under the door proper, and by directing that current over, near and against the coals. Ordinary firing is out swinging the door open, and without thereby cooling the firebox, the coal being thrown in under the baffle-plate. Uniform temperature and uniform steam pressure are promoted by feeding the fire little at atime as needed. The condition and color of the fire can bewatched continually from end to end of the firebox without opening the door; and holes in the fire bed promptly and easily detected and mended. Firing can be done deliberately under the baflie-plate, and the coal can be placed conveniently here and there, whereneeded, By the maintenance of an even temperature in the firebox, sudden of the boiler sheets are prevented. By the vertical member of the baffle-plate, the fireman is ordinarily protected from blistering bafiie-plate immovably Tin any higher or;

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vantages which are not fully particularized efiected withand destructive contractions and expansions c Patented July '28, 1914.{ Application filed January 26, 1914. Serial No. 814,302. i c 4 to an intermediate posi an arm 13 carrying a weight 14 by which in regulated portion of the doorway, and a slidable bent formly spaced from" the heat; and by the raising and lowering of that plate, the fire is controlled in different parts of the firebox. I

I claim as my invention 1 1. A bafile-plate door of the specified class,

comprising a swinging door adapted to close the upper portion of the doorway and an adjustable baffle-plate carried by the swinging door and having two angularly disposed baflie-plate carried by the swinging door ;-the upper portion of the bafiie-plate being uniswingingdoor, and

Copies of this patent may be obtained for live cents each, b'yeddressing the comprising a I the swinging door, the bafile-plate in difi'erent positions of ad- ]j'u's'tment relative to the swing g door;

the lower portion of the baifie-plate being ad- J justably spaced below that door.

3. A bafile-plate door of the specified class,

swinging door, means for holding the same in diiferent positions of adjustment, a slidable bent baffle-plate carried by and means for holding upper portion of the bafiieplate being spaced at a predetermined distance from the outside of the swinging door, and the lower portion of the 'baflie-plate being adjustably spaced from the bottom of the swinging door.

In testimonywhereof I subscribe my name hereto in the presence of two witnesses.

JOHN ZIMMERMAN.

. Witnesses WILLARD EDDY, MARION MoGArrREY.

Commissioner of Patents.

Washington, D. G. 

